WWAN module
NOTE: The WWAN module and the WLAN module are not interchangeable.
Description Spare part number
T77W595 LTE M.2 with GPS 800870-001
HSPA+M.2 918670-852
ME906S LTE with GPS M.2 918671-852
Before removing the WWAN module, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the following components:
a. Service door (see Service door on page 30).
b. Battery (see Battery on page 31).
c. Base enclosure (see Base enclosure on page 33).
d. Hard drive(s) and internal frame (see Hard drive(s) and internal frame on page 33).
e. Solid-state drive(s) (see Solid-state drives (M.2) on page 38).
f. WLAN module (see WLAN module on page 40).
Remove the WWAN module:
1. Disconnect the WWAN antenna cables (1) from the terminals on the WWAN module.
NOTE: The red WWAN antenna cable is connected to the WWAN module “Main” terminal. The blue
WWAN antenna cable is connected to the WWAN module “Aux” terminal.
2. Remove the Phillips screw (2) that secures the WWAN module to the base enclosure.
42 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
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